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Arsenal's first two matches in the 2015-16 Champions League were a 1-2 loss at Dinamo Zagreb's Maksimir Stadium and a 2-3 loss at home to Olympiakos. After splitting a pair with Bayern Munich, Arsenal put up a 3-0 win at home to avenge the Zagreb loss.
Now, what stands between the Gunners and the Round of 16 is undoing that defeat in September tomorrow in Athens.
To do so, Arsenal need to at least score two goals. Any victory for Arsenal with a two-goal margin will see them out of Group F and into the next round. Arsenal can also get through with a one-goal victory margin if they score three or more goals. Anything less, and Arsenal will head to the Europa League for the first time since the 1999-2000 season (then branded the UEFA Cup) in which they were runners up to Galatasaray.
That would be cold comfort indeed for Arsenal who have progressed to the knockout stages for the last 15 years.